Half to john m



2 Sheets-Sheet 1.

(No Model.) J. A. CAMPBELL.

TURN TABLE FOR SAWING MACHINES. No. 454,426. Patented June 16, 1891.

ATTORNEY.

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(No Model.) 2 Sheets-Sheet 2. J. A. CAMPBELL. TURN TABLE FOR SAWING MACHINES.

Patented June 16,1891.

ATTORNEY.

UNITED STATES PATENT OFFICE.

JAMES A. CAMPBELL, OF NE\V ORLEANS, LOUISIANA, ASSIGNOR. OF ONE HALF TO JOHN M. LOOKHART, OF SAME PLACE.

TURN-TABLE FOR SAW|NG=MACHINES.

SPECIFICATION forming part of Letters Patent No. 454,426, dated June 16, 1891.

Application filed June 19, 1890.

To all whom it may concern.-

Be it known that I, JAMEs A. CAMPBELL, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and useful Improvement in Turn-Tables for Sawing- Machines, which improvement is fully set forth in the following specification and accompanying drawings.

My invention relates to improvements in turn-tables for band sawing-machines, and has for its object an adjustable device for holding barrel-head wedges or other pieces of material of diiferent sizes which it is desired to bevel on the ends thereof and for this purpose it consists, first, of a turn-table having a laterally-movable adjustable arm with a slot therein and a centering-block pivotally supporting said turn-table adjustably mounted in said slot; second, of a table, a laterallymovable adjustable arm with a slot therein, a turn-table pivotally attached to a centeringblock adjustably mounted in said slot, workholding clamps adjustably secured to said turn-table, and a gage for regulating the position of one end of said arm; third, or the combination and arrangement of parts hereinafter more fully set forth.

Figure 1 represents a perspective view of a portion of a band-saw machine with a turntable embodying my invention. Fig. 2 represents a top view of the turn-table, the clamps being removed. Fig. 3 represents a detail view of the movable block in the support of the turn-table for centering the turn-table in line with the cutting-edge of the saw. Fig. 4: represents a plan view of one of the wedge clamps. Fig. 5 represents a sectional view 011 line a to, Fig. 1. Fig. 6 representsa sectional view on line y 3 Fig. 3. Fig. 7 represents a perspective view of the spring-controlled plate with projecting pin for engaging the work held between the clamps on an enlarged scale. Fig. 8 represents a sectional view on line .2 ,2, Fig. 1. Fig. 9 represents a detail view of the connection between the operating-arm and its actuating-lever.

Similar letters of reference indicate corresponding parts in the several figures.

Referring to the drawings, A designates a table or frame adapted to be secured to the Serial No. 355,949. (No model.)

frame of a band sawing-machine at the angle which it is desired to bevel theends of the barrel-head wedges or other pieces of work, so that the same will be properly cut. The table A is provided with a slot 13, in which the bands-aw O of the machine moves.

At the lower end of the table A and on the sides thereof are the plates D and E, the plate D having the openings F therein for adjustablypivoting the arm G, which carries the turn-table II. Movable in the longitudinal slot J of the arm G is a sliding or centering block K, with an opening L therein for the shaft or journal M of the turn-table. The block has in its ends on the underside of the turn-table the slots N, and the arm G has the openings P, through which the screws Q are passed to secure the said block in position when it has been adjusted, so that its opening L is in line with the toothed edge of the saw. Adjustable on the plate E is a gage R, having a slot S near one end thereof, an upwardlyprojecting lug T in the body thereof, and an upwardly-projecting lug U at its lower end provided with a screw V, working in said lower lug. The gage is secured in position on the said plate E by means of the screw XV, which passes through the slot S of the gage, and the opening X of the plate, and is provided with a clamping-nut X. To the arm G of the plate D is pivoted a lever Z, having cam-head Z, with a pin or stud A thereon inserted in the arm G, and said head is inserted in the arm Y and moves the said latter arm, and thus assists, with the spring 0, secured to the lower end of the arm Y and to the arm G, in keeping the arm G in adjusted position or against either of the lugs T and U of the gage R.

It will be seen from the foregoing statement that the free end of the arm G may be given a slight downward adjustment by operating the lever Z and its connected parts before the movement of the gage R by reason of the location of the end of said arm between the lugs T and U, the screw V in lug U limiting said movement.

It will be understood that the arm Y is pivotally connected to gage R at R, and when the screw W is loosened the said gage, arm Y, and spring C, connected to said arm, may

be unitedly moved and adjusted by the movement of the lever Z. The said adjustment of the parts set forth provide for the cutting of different lengths of wedges.

I11 the turn-table H are formed the openings D D, which are elongated or extended in a diametric direction of the said table and are adapted to receive the studs or pins E E of the Wedge-clamps F G, respectively, the said studsbeing moved and guided in said openings when the clamps are being adjusted. The said clamps have their outer edges coinciding with the edge of the turn-table II and are circular in form, while their inner edges are straight-lined andat an angle to eachother, so as to be adapted to receive between them a wedge-shaped piece of material. In the outer edges of the clamps are recesses H H, whose side walls are in contact with the side walls of the blocks or projections J J, connected with the turntable and provided with screws K K, which bear against the wedge-clamps F G,so as to move the same on the turn-table. To hold the said clamps in place when adjusted, the screws L L are provided, the same passing through openings M in the turn-table and the elongated openings or slots N in the wedge-cla1nps and have the binding-nuts P thereon.

. 011 the inner edge or face of each of the wedge-clamps F G is a recess Q, with an opening R in its rear wall for a pin S ,which is provided near its front end with a plate or block T, fitting in the walls of said recess, so as to be guided in its movements therein and has an extended port-ion above the upper face of the elamps, therebypermitting the said plate to be readily operated when desired, for the purpose of removing the wedge. A spring Vbetween the said plate and the clamp normally holds the plate substantially flush with the inner edge of the clamp, and the pin S, which is at the center of the straight-lined edge of the clamp, extends a shortdistance beyond the front of the plate T, so as to be adapted to enter an opening in the side of barrel-head wedge held between the clamp and keep the same from slipping during the sawing or beveling of the ends of the wedge, as well as causing the wedges to be sawed uniformly.

In the turn-table and on one side of the openings D D are a series of small centerpunched holes U close together and in line and on opposite sides of a line from the cutting-edge of the saw to the opening L, so as to regulate the adjustment of both clamps F G as to their distances from the center of the turn-table. 7 7

The turn-table II rotates within a recessed portion W" of the table A and is of such thickness that its upper face is flush with the face of the said table, thereby permitting the ends of the barrel-head wedge to rest on the said table during the sawing of the bevels.

In operating the device the frame and table A, with the turn-table H, are secured to the frame of the machine, so that the said table is at the angle of the desiredbevel. The arm G is then adjusted at its pivotal point, so as to accommodate the required length of the barrel-head wedge or other piece to be beveled, the same being inserted between the wedge-clamps F G, which have been adjusted to suit the width of the wedge. The wedge is placed between said clamps, so as to be in contact with the turn-table and the frame, the projecting ends of one of the pins S" entering an opening in the side of the said Wedge and the edges of the wedge being against the inner sides of the clamps. cutting the longer angle or larger bevel on the end of the wedge the arm G is brought in contact with the lug T and clamped in position by means of the leVerZ, the cam-head Z, carrying a pin or stud A, and the spring 0. The edge of the wedge is then brought in contact with the operating-saw and the turn-table rotated, either by hand or by any suitable mechanism, so as to bear against the cutting-edge of the saw, whereby the latter can effectually perform its work and make the larger bevel on the one end of the wedge. The turn-table H is then further rotated, so as to present the' other end of the barrel-head wedge to the saw, and held in contact therewith when the larger bevel onthat end is made. The wedge is then removed from between the clamps and turned over, so as to present the former under side as the upper one, and in this position is inserted between the clamps, the hole in its side now receiving the projecting end of the other pin S. The

lever Z is then operated, so as to bring the arm G in contact with the lug U, and thereby moving the center of the turn-table farther from the saw, so as to be in position for the cutting of the smaller bevel. The turn-table is then rotated, bringing the end of the barrel-head wedge against the saw, so that the latter will out the smaller bevel at the said end. WVhen this work is accomplished, the other end of the wedge is presented to the saw and a similar operation performed. The wedge properly beveled at both ends can then be released from the clamps.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination of a turn-table with a support and a laterally-movable adjustable arm with a slot therein and a centering-block adjustably mounted in said slot and pivotally supporting said turn-table, substantially as described. ,7 ,7 7 7 7' V 2. The combination of a table, a laterallymovable adjustable arm with a slot therein, a turntable pivotally attached to a centeringblock adj ustably mounted'in said slot, and work-holding clamps adjustably secured to said turn-table, substantially as described.

The combination of a table, an adjust- Fo r IIO

able arm with a slot therein,a turn-table pivotally attached to a centering-block adj ustably mounted in said slot, adjustable Workholding clamps on said table, and a gage for regulating the position of one end of said arm, said gage being connected with saidtable and adapted to contact with and operate said arm, substantially as described.

4:. The combination of a table or frame adapted to be secured to a sawing-machine, a swinging arm adjustable atits pivotal connection, a gage for adjusting the position of the other end of the said arm, a turntable journaled on said arm, and work-holding clamps adjustably secured to said turn-table and having their inner edges at an angle to each other, substantially as described. I

5. The combination of a frame with a recessed portion, an adjustable arm carrying an adjustable centering-block, a turn-table pivoted to said centering-block, and workholding clamps secured to said turn-table, substantially as described.

6. The combination of a frame, a gage adj ustable thereon having lugs and an arm movable between said lugs, an arm pivoted to the gage, a lever having a head pivoted to the arm movable between said lugs and provided with a pin or stud inserted in the said latter arm, and a spring connected to the arm pivoted to the gage, substantially as described.

7. In a device for the purpose named, a gage having a slot therein and two lugs proj ecting from the one side thereof, one of said lugs being provided with a screw working therein, combined with an adjustable laterally-movable arm supporting a turn-table and having one end mount-ed between said lugs, substantially as described.

8. The combination of a frame, an adjustably-pivoted arm with a slot therein, a box with an opening therein adjustable in said slot longitudinally of the arm, and a turn-table journaled in said opening in the box, substantially as and for the purpose set forth.

9. A turn-table having openings therein, Work-clamps having studs in said openings, and a series of small holes U in said turntable for each clamp, the holes of each series being in line and close together and the holes of the two series being on opposite sides of a diametric line on the turn-table between the clamps, substantially as and for the purpose set forth.

10. A sawing-machine having an inclined table or frame with slot therein, plates connected with and on both sides of said frame, aswinging arm adj ustably connected with one of said plates, a gage for said arm, movable on the other plate, and a turn-table on said arm, combined substantially as described.

11. A frame, a turn-table rotatable therein, a support or arm for said turn-table, having a lever connected therewith, a gage connected with said turn-table and adapted to adjust one end of said lever, the other end of the 1ever being independently adjustable on the frame, said parts being combined substantially as described.

JAMES A. CAMPBELL. Witnesses:

E. J. BANNETT, F. J. ALEIX. 

